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Dagher D, Elmansi H, Nasr JJ, El-Enany N. Utility of a xanthene-based dye for determination of nilotinib using two spectroscopic approaches. Applications to bulk powder, capsules, and spiked human plasma. LUMINESCENCE 2023; 38:291-301. [PMID: 36702460 DOI: 10.1002/bio.4448] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2022] [Revised: 01/19/2023] [Accepted: 01/23/2023] [Indexed: 01/28/2023]
Abstract
Novel, selective, facile, and precise spectroscopic approaches were validated to determine nilotinib hydrochloride, a tyrosine kinase inhibitor used to treat patients with chronic myeloid leukemia. These approaches depend on the reaction of the tertiary amine group of nilotinib with erythrosine B in the Britton-Robinson buffer at pH 4. Method I, depends on measuring the absorbance of the formed complex at 551 nm. The absorbance concentration plot showed linearity over the concentration range of 1.0 to 9.0 μg/ml. Method II, involved the measurement of the quenching of the native fluorescence of erythrosine B by adding nilotinib in an acidic medium. The fluorescence quenching of erythrosine B was measured at 549 nm after excitation at 528 nm. This approach showed excellent linearity in the concentration range of 0.04 to 0.7 μg/ml. The limit of detection values for Method I and Method II were 0.225 and 0.008 μg/ml, respectively, while the limit of quantitation values for Method I and Method II were 0.68 and 0.026 μg/ml, respectively. To get the optimal conditions, factors that may affect the formation of the ion-pairing complex were thoroughly examined. The two approaches were carefully validated following the International Conference of Harmonization (ICH Q2R1) guidelines. Statistical assessment of the results achieved using the suggested and previously published comparison approaches showed no significant difference. The approaches were successful in determining nilotinib in a pharmaceutical dosage form as well as spiked human plasma samples. The eco-friendly properties of the methods were evaluated by three different tools.
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Affiliation(s)
- Diaa Dagher
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura, Egypt
| | - Heba Elmansi
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura, Egypt
| | - Jenny Jeehan Nasr
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura, Egypt
| | - Nahed El-Enany
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura, Egypt.,Department of Pharmaceutical Chemistry, Faculty of Pharmacy, New Mansoura University, New Mansoura, Egypt
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Dagher D, Elmansi H, Nasr JJ, El-Enany N. Utility of a novel turn-off fluorescence probe for the determination of tranilast, an adjunctive drug for patients with severe COVID-19. RSC Adv 2022; 12:22044-22053. [PMID: 36043110 PMCID: PMC9361924 DOI: 10.1039/d2ra02239g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Accepted: 07/26/2022] [Indexed: 12/15/2022] Open
Abstract
Tranilast (TR) could be investigated as a suitable anti-inflammatory and NLRP3 inflammasome inhibitor medication for the treatment of COVID-19 acute patients. Owing to its importance, our study was constructed for the determination of TR using a new, fast, sensitive, and reliable green spectrofluorimetric method. TR was quantified in this study by forming a complex with the acriflavine (AC) reagent. The reaction between TR and AC quenched the fluorescence of AC through the formation of an ion-association complex and the response was measured at 493 nm after excitation at 263 nm. It was observed that the quenching of the fluorescence of AC was linear (r = 0.9998) with the concentration of TR in the range of 1.0–15.0 μg mL−1. The limit of detection was 0.224 μg mL−1, and the limit of quantification was 0.679 μg mL−1. The fluorescence quenching mechanism was carefully studied and was confirmed to be able to analyze TR in its pure form and its prepared pharmaceutical dosage form. To validate the method, the international conference of harmonization (ICH) Q2R1 guidelines were followed. The statistical assessment of the proposed and comparison methods revealed no significant differences between them. Moreover, the green criteria of the method were evaluated and confirmed. Tranilast (TR) could be investigated as an anti-inflammatory and NLRP3 inflammasome inhibitor medication using acriflavine.![]()
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Affiliation(s)
- Diaa Dagher
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Mansoura University Mansoura 35516 Egypt
| | - Heba Elmansi
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Mansoura University Mansoura 35516 Egypt
| | - Jenny Jeehan Nasr
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Mansoura University Mansoura 35516 Egypt
| | - Nahed El-Enany
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Mansoura University Mansoura 35516 Egypt .,Department of Pharmaceutical Chemistry, Faculty of Pharmacy, New Mansoura University New Mansoura 7723730 Egypt
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Alhakamy NA, Noor AO, Hosny KM, Nasr JJ, Fouda MMG, Khattab TA, Gaffer HE. Synthesis of New Cyanopyridine Scaffolds and their Biological Activities. Curr Org Synth 2020; 17:567-575. [PMID: 32600235 DOI: 10.2174/1570179417666200628020602] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Revised: 06/09/2020] [Accepted: 06/12/2020] [Indexed: 11/22/2022]
Abstract
BACKGROUND 3-Cyanopyridine analogues are significant moieties with a variety of biological effects such as antioxidant, antimicrobial, anti-inflammatory and cytotoxic agents. In addition, they could be applied in the treatment of several diseases. OBJECTIVE The study conducted cyclo-addition of 3a-e derivatives with malononitrile to yield the corresponding 6-(4-((3-cyano-pyridinyl) amino) phenyl)-4-phenylnicotinonitriles 4a-e. MATERIALS AND METHODS Physical and spectral analyses were performed to demonstrate the proper structures of all incorporated analogues. The in vitro antimicrobial activity of the preps derivatives was investigated by testing them with a panel of pathogenic strains of bacteria and fungi. The anti-tuberculosis activity was observed against the Mycobacterium tuberculosis H37Rv strain. When examining cytotoxic agents for four different cell lines, researchers found that their activity was persuasive compared with that of standard antibiotics. In addition, the antioxidant activity of the synthesized analogues was evaluated using the DPPH method. RESULTS AND DISCUSSIONS The synthesized analogues were examined to determine their activity against the M. tuberculosis H37Rv strain. Derivatives 2c, 2e, 3d and 3e had good inhibition. Further screening was done for the highest potency against M. tuberculosis to determine the MICs. The antioxidant efficacy was evaluated via the DPPH technique matched with vitamin C as a positive control. The prospective results showed that the derivatives did not display scavenging efficacies in comparison with the standard. CONCLUSION Some synthesized derivatives displayed good potency against bacterial activity and M. Tuberculosis. However, the antioxidant performance of these derivatives did not display scavenging efficacies compared to vitamin C. The cytotoxic activity of the synthesized derivatives was examined against various cell lines to display good cytotoxic activity in the order 4a-e > 2a-e > 3a-b.
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Affiliation(s)
- Nabil A Alhakamy
- Department of Pharmaceutics, Faculty of Pharmacy, King Abdulaziz University, Jeddah, Saudi Arabia,Center of Excellence for Drug Research and Pharmaceutical Industries, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Ahmad O Noor
- Department of Clinical Pharmacy, Faculty of Pharmacy, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Khaled M Hosny
- Department of Pharmaceutics, Faculty of Pharmacy, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Jenny Jeehan Nasr
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura 35516, Egypt
| | - Moustafa M G Fouda
- Pre-Treatment and Finishing of Cellulosic based Fibers Department, Textile Industries Research Division, National Research Centre, 33 El-Behooth Street, Dokki, Giza, 12311, Egypt
| | - Tawfik A Khattab
- Dyeing, Printing and Auxiliaries Department, National Research Centre, 33 El-Buhouth Street, Dokki, Cairo 12622, Egypt
| | - Hatem E Gaffer
- Dyeing, Printing and Auxiliaries Department, National Research Centre, 33 El-Buhouth Street, Dokki, Cairo 12622, Egypt
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Nasr JJ, Shalan S. Simultaneous estimation of amlodipine and atorvastatin by micelle-augmented first derivative synchronous spectrofluorimetry and multivariate analysis. Spectrochim Acta A Mol Biomol Spectrosc 2020; 224:117430. [PMID: 31382228 DOI: 10.1016/j.saa.2019.117430] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Revised: 07/25/2019] [Accepted: 07/25/2019] [Indexed: 06/10/2023]
Abstract
Five Selective, rapid and sensitive spectrofluorimetric methods were performed in this study for the simultaneous estimation of amlodipine besylate (AML) and atorvastatin (ATR) in their binary mixtures and combination polypills that are used for management of cardiovascular conditions. The first method depends on micelle-enhanced first derivative synchronous fluorimetric analysis (method I) and the other four methods are multivariate analysis techniques based on the use of factor-based calibration prediction methods comprising partial least squares (PLS), Principal Component Regression (PCR), genetic algorithm PLS (GA-PLS) and genetic algorithm PCR (GA-PCR). The synchronous fluorescence spectra of the solutions were measured at a constant wavelength difference; Δλ = 100 nm. The magnitudes of the peaks of the first derivative spectra (1D) were measured at 292 nm and 387 nm for ATR, and AML correspondingly. The multivariate models were constructed utilizing fifteen mixtures as a calibration set and ten mixtures as a validation set. The linearity of all the methods was in the concentration ranges of (0.1-4.0 μg mL-1, 0.4-10.0 μg mL-1) for AML and ATR, correspondingly. Statistical analysis revealed no significant difference between the proposed methods and the reference method. The validity of the proposed methods allows their suitability for quality control work. All the analysis settings were optimized and all the suggested procedures were applied productively for the determination of both drugs in synthetic mixtures, validation set, and combination polypills.
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Affiliation(s)
- Jenny Jeehan Nasr
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura 35516, Egypt.
| | - Shereen Shalan
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura 35516, Egypt
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Nasr JJ, Shalan S. Validated 1H and 19F nuclear magnetic resonance for the quantitative determination of the hepatitis C antiviral drugs sofosbuvir, ledipasvir, and daclatasvir in tablet dosage forms. Microchem J 2020. [DOI: 10.1016/j.microc.2019.104437] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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Elmansi H, Nasr JJ, Rageh AH, El-Awady MI, Hassan GS, Abdel-Aziz HA, Belal F. Assessment of lipophilicity of newly synthesized celecoxib analogues using reversed-phase HPLC. BMC Chem 2019; 13:84. [PMID: 31384831 PMCID: PMC6661952 DOI: 10.1186/s13065-019-0607-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Accepted: 06/29/2019] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND Lipophilicity is a physicochemical property of an essential importance in medicinal chemistry; therefore, fast and reliable measurement of lipophilicity will affect greatly the drug discovery process. RESULTS A series of N-benzenesulfonamide-1H-pyrazoles, oximes and hydrazones as celecoxib analogues was investigated with regard to their retention behavior using reversed-phase high performance liquid chromatography (RP-HPLC). The mobile phases employed for this study consist of a mixture of water and methanol in different proportions. In addition, the stationary phase utilized for this separation was C18 silanized silica gel and using 200 nm as a detection wavelength. The retention behavior of the investigated compounds was determined based on practical determination of log k at different concentrations of methanol (as an organic modifier) in the mobile phase ranging from 60 to 80%. It was observed that the retention of these compounds (expressed as log k) decreased in a linear manner with increasing the concentration of methanol. High correlation coefficients (more than 0.90 in most cases) were obtained for the relationship between the volume fraction of the organic solvent and the retention values represented as log k w. A comparative evaluation was carried out between chromatographically-obtained lipophilicity parameters (represented as lipophilicity chromatographic index log k w or isocratic chromatographic hydrophobicity index, φ 0) and the computationally calculated log P values (miLogP, ALOGP, ACD/Labs and ALOGPs). CONCLUSION It was found that a good correlation exists between the experimental and computed log P values. In the future, these results can give a deep insight about the anti-inflammatory and analgesic activity of the newly synthesized compounds.
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Affiliation(s)
- Heba Elmansi
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura, 35516 Egypt
| | - Jenny Jeehan Nasr
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura, 35516 Egypt
| | - Azza H. Rageh
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Assiut University, Assiut, 71526 Egypt
| | - Mohamed I. El-Awady
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura, 35516 Egypt
| | - Ghada S. Hassan
- Department of Medicinal Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura, 35516 Egypt
| | - Hatem A. Abdel-Aziz
- Department of Applied Organic Chemistry, National Research Centre, Dokki, 12622 Egypt
| | - Fathalla Belal
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura, 35516 Egypt
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Shalan S, Nasr JJ. Simultaneous evaluation of losartan and amlodipine besylate using second-derivative synchronous spectrofluorimetric technique and liquid chromatography with time-programmed fluorimetric detection. R Soc Open Sci 2019; 6:190310. [PMID: 31183153 PMCID: PMC6502389 DOI: 10.1098/rsos.190310] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2019] [Accepted: 03/19/2019] [Indexed: 05/19/2023]
Abstract
This study is concerned with two sensitive, fast and reproducible approaches; namely, second-derivative synchronous fluorimetry (method I) and reversed phase high-performance liquid chromatography with fluorimetric detection (method II) for synchronized evaluation of losartan (LOS) and amlodipine besylate (AML). Method I is based on measuring second-derivative synchronous fluorescence spectra of LOS and AML at Δλ = 80 nm in water. The experimental factors influencing the synchronous fluorescence of the considered compounds were sensibly adjusted. The chromatographic analysis was executed on a Nucleodur MN-C18 column of dimensions; 250 × 4.6 mm i.d. and 5 µm particle size). The fluorimetric detection was time-programmed at λem = 440 nm for AML (0.0-7.5 min) and at λem = 400 nm for LOS (7.5-10 min) after excitation at λex = 245 nm. The mobile phase is a blend of acetonitrile with 0.02 M phosphate buffer in a proportion of 45 : 55, pH 4.0, pumped using a flow rate of 1 ml min-1. The calibration plots were established to be 0.1-4.0 µg ml-1 for both drugs in method I and 0.05-4.0 µg ml-1 for both drugs in method II. The study was extended to the evaluation of the two drugs in their co-formulated tablets.
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Al-Attas AS, Nasr JJ, Shalan S, Belal F. First derivative spectrofluorimetric determination of zopiclone and its degradation product, 2-amino-5-chloropyridine, in pharmaceutical formulations with preliminary tool in biological fluids for clinical evidence of zopiclone intake. Spectrochim Acta A Mol Biomol Spectrosc 2017; 181:148-152. [PMID: 28359903 DOI: 10.1016/j.saa.2017.03.036] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Revised: 03/07/2017] [Accepted: 03/16/2017] [Indexed: 06/07/2023]
Abstract
A simple, fast, sensitive and stability-indicating derivative spectrofluorimetric method is presented for the assay of zopiclone (ZOP), a drug with hypnotic effect, and its main degradation product and major contaminant, 2-amino-5-chloropyridine (ACP). The method is based on measuring the inherent fluorescence intensity of both drugs at λex=300nm in methanol, then differentiation using D1 (first derivative technique). The developed method was found to be rectilinear over a range of 0.2-4μg/mL of ZOP and 4-100ng/mL of ACP. The limits of detection were 0.05μg/mL of ZOP and 0.2ng/mL of ACP with the limit of quantitation of 0.17μg/mL of ZOP and 0.7ng/mL of ACP. The outcoming results of the proposed method were compared to those obtained by a reference method showing no significant statistical difference between them concerning precision and accuracy. Additionally, the developed method was applied for detecting ACP in spiked human urine and plasma specimens as a tool of clinical evidence of zopiclone intake that can be easily implemented in forensic laboratories. The proposed method was validated as per ICH guidelines.
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Affiliation(s)
- Amirah S Al-Attas
- Department of Chemistry, Faculty of Science, Al Faisaliah Campus, King Abdulaziz University, Jeddah 21533, Saudi Arabia
| | - Jenny Jeehan Nasr
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura 35516, Egypt.
| | - Shereen Shalan
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura 35516, Egypt
| | - Fathalla Belal
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura 35516, Egypt
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Ibrahim F, Nasr JJ. Fourth-derivative synchronous spectrofluorimetry and HPLC with fluorescence detection as two analytical techniques for the simultaneous determination of itopride and domperidone. LUMINESCENCE 2015; 31:255-63. [DOI: 10.1002/bio.2955] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2014] [Revised: 05/05/2015] [Accepted: 05/05/2015] [Indexed: 11/05/2022]
Affiliation(s)
- Fawzia Ibrahim
- Department of Pharmceutical Analytical Chemistry; University of Mansoura; Mansoura Egypt
| | - Jenny Jeehan Nasr
- Department of Pharmceutical Analytical Chemistry; University of Mansoura; Mansoura Egypt
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Al-Attas A, Nasr JJ, El-Enany N, Belal F. A green capillary zone electrophoresis method for the simultaneous determination of piperacillin, tazobactam and cefepime in pharmaceutical formulations and human plasma. Biomed Chromatogr 2015; 29:1811-8. [DOI: 10.1002/bmc.3500] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2014] [Revised: 11/04/2014] [Accepted: 04/19/2015] [Indexed: 11/10/2022]
Affiliation(s)
- Amirah Al-Attas
- Department of Chemistry, Faculty of Sciences - Al Faisaliah Campus; King Abdulaziz University; Jeddah Saudi Arabia
| | - Jenny Jeehan Nasr
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy; Mansoura University; Mansoura 35516 Egypt
| | - Nahed El-Enany
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy; Mansoura University; Mansoura 35516 Egypt
| | - Fathalla Belal
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy; Mansoura University; Mansoura 35516 Egypt
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Nasr JJ, Shalan S, Belal F. Simultaneous determination of tylosin and josamycin residues in muscles, liver, eggs and milk by MLC with a monolithic column and time-programmed UV detection: application to baby food and formulae. Chem Cent J 2014; 8:37. [PMID: 24976860 PMCID: PMC4069345 DOI: 10.1186/1752-153x-8-37] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2014] [Accepted: 06/13/2014] [Indexed: 11/23/2022] Open
Abstract
Background Tylosin and Josamycin are macrolide antibiotics. They are used in the treatment of pneumonia, arthritis and mastitis in cattle, and mycoplasma infections in poultry. The incorrect use of antibiotics has lead to the presence of antibiotic residues in foods. The residues cause toxic effects on consumers. Results A simple and sensitive method was optimized and validated for the analysis of tylosin and josamycin residues in food samples. Analytical separation was performed in less than 10 min using a RP C18 monolithic column with time-programmed UV detection at 287 nm and 232 nm and a micellar solution of 0.17 M sodium dodecyl sulphate, 14% methanol and 0.3% triethylamine in 0.02 M phosphoric acid buffered at pH 4 as the mobile phase. The method was fully validated in accordance with ICH guidelines. The micellar method was successfully applied to quantitatively determine tylosin and josamycin residues in spiked chicken muscles, chicken liver, bovine muscles, liver, milk and eggs. It was also extended to the determination of tylosin and josamycin residues in chicken-based baby food and baby formulae. The compounds were separated by a monolithic column which, on account of its particular structure, could bear higher flow rates than usually found for this kind of analysis. High extraction efficiency for tylosin and josamycin was obtained without matrix interference in the extraction process and in the subsequent chromatographic determination. No organic solvent was used during the pretreatment step. Hence, it is considered an interesting technique for “green” chemistry. Conclusion The proposed method was validated and successfully applied for the determination of tylosin and josamycin residues in spiked chicken muscles, chicken liver, bovine muscles, liver, milk and eggs. It was also extended to the determination of tylosin and josamycin residues in chicken-based baby food and baby formulae.
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Affiliation(s)
- Jenny Jeehan Nasr
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, University of Mansoura, Mansoura 35516, Egypt
| | - Shereen Shalan
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, University of Mansoura, Mansoura 35516, Egypt
| | - Fathalla Belal
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, University of Mansoura, Mansoura 35516, Egypt
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Nasr JJ, Shalan S. Spectrofluorimetric analysis of ethopabate in veterinary formulations with application to residue determination in chicken muscles and liver. LUMINESCENCE 2014; 29:1188-93. [DOI: 10.1002/bio.2683] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2014] [Revised: 03/10/2014] [Accepted: 03/24/2014] [Indexed: 11/10/2022]
Affiliation(s)
- Jenny Jeehan Nasr
- Department of Analytical Chemistry; University of Mansoura; Mansoura Egypt
| | - Shereen Shalan
- Department of Analytical Chemistry; University of Mansoura; Mansoura Egypt
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Nasr JJ, Shalan S, Belal F. Determination of Carbadox and Olaquindox Residues in Chicken Muscles, Chicken Liver, Bovine Meat, Liver and Milk by MLC with UV Detection: Application to Baby Formulae. Chromatographia 2013. [DOI: 10.1007/s10337-013-2405-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Belal F, El-Brashy A, Eid M, Nasr JJ. Stability-Indicating Micellar Liquid Chromatographic Method for the Determination of Clopidogrel. Application to Tablets and Content Uniformity Testing. J LIQ CHROMATOGR R T 2009. [DOI: 10.1080/10826070903320764] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Fathalla Belal
- a Faculty of Pharmacy, Department of Analytical Chemistry , University of Mansoura , Mansoura, Egypt
| | - Amina El-Brashy
- a Faculty of Pharmacy, Department of Analytical Chemistry , University of Mansoura , Mansoura, Egypt
| | - Manal Eid
- a Faculty of Pharmacy, Department of Analytical Chemistry , University of Mansoura , Mansoura, Egypt
| | - Jenny Jeehan Nasr
- a Faculty of Pharmacy, Department of Analytical Chemistry , University of Mansoura , Mansoura, Egypt
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Belal F, Elbrashy A, Eid M, Nasr JJ. Stability-Indicating LC Method for the Determination of Lacidipine in Tablets. Application to Degradation Kinetics and Content Uniformity Testing. Chromatographia 2009. [DOI: 10.1365/s10337-009-1067-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Belal F, Elbrashy A, Eid M, Nasr JJ. Stability‐Indicating HPLC Method for the Determination of Quetiapine: Application to Tablets and Human Plasma. J LIQ CHROMATOGR R T 2008. [DOI: 10.1080/10826070802019681] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Fathalla Belal
- a Faculty of Pharmacy, Department of Analytical Chemistry , University of Mansoura , Mansoura, Egypt
| | - Amina Elbrashy
- a Faculty of Pharmacy, Department of Analytical Chemistry , University of Mansoura , Mansoura, Egypt
| | - Manal Eid
- a Faculty of Pharmacy, Department of Analytical Chemistry , University of Mansoura , Mansoura, Egypt
| | - Jenny Jeehan Nasr
- a Faculty of Pharmacy, Department of Analytical Chemistry , University of Mansoura , Mansoura, Egypt
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Rizk M, Ibrahim F, Hefnawy M, Nasr JJ. Micellar liquid chromatographic analysis of benzyl alcohol and benzaldehyde in injectable formulations. Acta Pharm 2007; 57:231-9. [PMID: 17507319 DOI: 10.2478/v10007-007-0019-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An accurate, sensitive and selective reversed-phase micellar liquid chromatographic method was developed for simultaneous determination of benzyl alcohol and benzaldehyde. This method was applied in different injectable formulations containing diclofenac, piroxicam, lincomycin and clindamycin. The method showed excellent linearity in the range of 10-100 microg mL(-1) and 1-20 microg mL(-1) with the limit of detection (S/N = 3) 0.25 microg mL(-1) (2.3 x 10(-6) mol L(-1)) and 0.12 microg mL(-1) (1.13 x 10(-6) mol L(-1)) for benzyl alcohol and benzaldehyde, respectively. The suggested method was successfully applied to the analysis of the studied drugs in bulk with average recoveries of 100.1 +/- 1.0% for benzyl alcohol and 100.4 +/- 1.6% for benzaldehyde, and to the determination of benzyl alcohol and benzaldehyde in injectable formulations with the respective average recoveries of 99.8 +/- 0.3 and 100.0 +/- 0.4%.
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Affiliation(s)
- Mohamed Rizk
- Department of Analytical Chemistry, University of Mansoura, Mansoura-35510, Egypt
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